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ib01r/t
Dodge Dakota
5/23/2001
18:48:56
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 Subject: cut cat?????
IP: Logged
Message:
is it worth the time to cut off the cat, is their any gain in the top end?????????????/
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jeffster
Dodge Dakota
5/23/2001
20:00:16
|  RE: cut cat?????
IP: Logged
Message:
I heard you will only gain a few horse power max. Better to just save the planet for only 3 HP. You can get a free flowing cat however. I think Bernd even say you could even hurt HP by removing the cat because it screws withe the sensors etc. Don't quote me on that however.
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Ryan Kane
Dodge Dakota
5/23/2001
23:59:51
| RE: cut cat?????
IP: Logged
Message:
I cut out my cat and got an extra 1 mpg due to its very restrictive properties. They are not made to be free flowing. Also, I disconnected the smog pump by cutting out the belt. Have had no problems and have enjoyed higher mpg and a little hp's due to a free flowing exhaust. I get 100% fuel burn in each cylinder from my aftermarket ignition system, so I'm not too worried about a deteriorating Planet Earth...
A gasoline combustion engine has never been considered an efficient engine. The purpose of a cat is to burn leftover and unburned fuel and fumes from incomplete combustion in the cyliders and keep them from going into the atmosphere. Good idea. But, if somebody is already buring all fuel in each cylinder, there really isnt much need for a cat. At least not that I can see. So, I cut mine out.
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jeffster
Dodge Dakota
5/24/2001
02:25:05
| RE: cut cat?????
IP: Logged
Message:
What's a smog pump?
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ib01r/t
Dodge Dakota
5/25/2001
20:11:45
| RE: cut cat?????
IP: Logged
Message:
thanks for the info!!!
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big boy
Dodge Dakota
5/25/2001
22:46:59
| RE: cut cat?????
IP: Logged
Message:
RYAN KANE
yea well you destroyed your smog cert. Ok thats cool you are also dumping 90% or more in polution into the atmosphere for a 5% gain in milage. Who the hell told you that you get 100% burn in your combustion chamber??? That is not possible even with aftermarket spark. If everone on the planet did that to their car or truck the air you breath out in the country right now would look like Mexico city on bad day and in the major cities it would be so dark from polution that street lights would be on round the clock. Don't believe me ??? It happened here in the states in Pittsburgh in the 20's just before the "29 crash. I was in a steel mill museum in P town 15 years ago and they had pictures showing just that from all the crap the mills were sending out their stacks. Something else you partialy considered in your post. It is true that a piston engine is not efficient. Almost 85% of the combustables in gasoline are not burned in the combustion chamber but are exhausted into the atmosphere, simular to what you said. Releasing not only particlates but unburned gasses. Some of which turn into sulfuric acid. That ruins everybodies day. The catylitic converter you removed is the cheapest most efficient way that we currently have to clean up the air and you destroyed it. Cars and trucks today produce only 3% of the polutants that they did per mile driven in 1965, except for yours. You probably own and drive that smelly piece of crap I follw home that smells like someboby is dumping pure gasoline into the air. Thanks, my clean running Dak is sucking in some of that free gas you are dumping and getting better milage because of it. I just wish Detroit could persuade the feds to allow them to release the new radiator coating that was invented a few years ago that is a low temp catylitic converter that actually cleans up the atmosphere when boneheads like yourself do something stupid. Are they talking about starting manditory anuall tailpipe sniffs in your area that cost everybody $75 a piece per year??????? If they are you are a major reason why. People that think the know what is going on under thier hoods should stay out from under them and leave them to those of us who do.
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jeffster
Dodge Dakota
5/25/2001
22:53:59
| RE: cut cat?????
IP: Logged
Message:
Well said!!
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Ryan Kane
Dodge Dakota
5/29/2001
19:04:28
| RE: cut cat?????
IP: Logged
Message:
I pass the local emissions/smog test just fine thank you. And yes, it was done WITHOUT a cat. My catless Dakota emits clean exhaust, just like your Dakota WITH a cat.
Thanks and have a nice day.
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Dodge Dakota
5/29/2001
20:43:35
| RE: cut cat?????
IP: Logged
Message:
HAHAHA
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sandman
Dodge Dakota
5/29/2001
21:02:06
| RE: cut cat?????
IP: Logged
Message:
Everyone catalytic converters are pretty free flowing these days. The Viper, Corvete, Porshe 911 turbo... all turn in respectable time with catalytic converters in place. Even disels are going to be required to run converters and a new low sulfur fuel. Disels are many times more effecient then gasoline engines. There is no reason why you can not run a converer.You would gain more HP from useing a good sythetic and platnium plugs then removeing your dual catalytic converters.
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smartDakowner
Dodge Dakota
5/29/2001
21:04:45
| RE: cut cat?????
IP: Logged
Message:
Ryan there is no way in hell you could pass the NO2 or the sulfer dioxide test. How do I know??? I test the things here in Cleveland.
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ib01r/t
Dodge Dakota
5/30/2001
00:18:27
|  RE: cut cat?????
IP: Logged
Message:
noticed a good gain in throttle responce today with cut cat!!!!!!!! will take to the track real soon.
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CyberWolf
Dodge Dakota
5/30/2001
12:08:27
|  RE: cut cat?????
IP: Logged
Message:
I'm not going to take sides on this subject but I will say that I do believe him about passing the sniffer. I have an '85 Chevy K20 with about 430 hp, no where near stock, and no cat. It passes with flying colors. My only problem is passing the visual test. Thats what friends are for though. As far as getting 100% combustion, there are emissions that dont get burnt and the catalytic converter is a catalyst that nutralizes those emissions. It does not burn unused fuel. If you want to see what kind of mods are in my engine that passes the test check out the truck for sale on my website. For those that dont believe me I have the test results that I have no problem scanning. I actually was way below the maximum on most areas.
http://members.home.net/kahamm/home.htm
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big boy
Dodge Dakota
5/30/2001
20:00:17
| RE: cut cat?????
IP: Logged
Message:
Like he said, Ain't no way in hell you can pass the sulpher test. Aint been a vehicle built in the USA that passed the sulfer test without a cat since 1975. Couple of really small jap jobs did until the standards changed (tougher) in '79, but absolutely nothin since then.
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smartDakowner
Dodge Dakota
5/30/2001
20:10:45
| RE: cut cat?????
IP: Logged
Message:
Federal law requires that if you live in an area that requires a cat-con on you vehicle AND an annual sniffer test is required for licenseing the vehicle and you show up at a federal or state test site and the cat-con is inoperable or missing that your vehicle does not get the cert that must be show and be current to license the vehicle. So your vehicles without them are either in a non testing zone or you don't drive them on the road.
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Wayne
Dodge Dakota
5/31/2001
17:04:16
| RE: cut cat?????
IP: Logged
Message:
It is possible to tune a car to meet California emissions standards without the use of cats or smog pumps. Hot Rod magazine has done this on a couple of ocassions. If it had the equipment, then it must have it and in working condition BUT the sniffer standards can be met. If everyone kept their engines tuned properly, we wouldn't need all this polution stuff.
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smartDakowner
Dodge Dakota
5/31/2001
17:20:03
| RE: cut cat?????
IP: Logged
Message:
yer right they did but if you check the date of manufacture of the vehicle that they did that to you will find that every one of them is pre 1975. Been readin HotRod since '68.
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smartDakowner
Dodge Dakota
5/31/2001
17:22:13
| RE: cut cat?????
IP: Logged
Message:
Federal Law requires any USA built car or small truck built after 1974 production year to have a cat. ITS THE LAW.
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CyberWolf
Dodge Dakota
5/31/2001
17:28:07
| RE: cut cat?????
IP: Logged
Message:
big boy, I have passed the sniffer every year without a cat since I built my engine. Just because you have not seen it means NOTHING to me.
smartDakowner, I live in Dallas county. We have strict emission laws. I do have my truck tested every year and I have driven through test sites. I pass the sniffer. The only thing I don't pass is the visual inspection. I have ways to get around that one though.
To everyone, if you want to see what kind of mods are on my truck that actually passes the sniffer check out my web page. If no one believes me I do have the test results that I have no problem posting.
http://members.home.net/kahamm/home.htm - click on truck for sale
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surferpug
Dodge Dakota
5/31/2001
23:47:00
| RE: cut cat?????
IP: Logged
Message:
go with high flow cat, I recommend the magnaflow setup check it out at www.magnaflow.com. Cutting the cat will seriously reduce hp on the newer 4.7L models due to messing with the computer and not enough back-pressure
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mike
Dodge Dakota
6/01/2001
15:13:17
| RE: cut cat?????
IP: Logged
Message:
I was just wondering. I have a 89 dodge dakota sport 4by4 with 3.9L, and I wanted to put on true dual exhaust strait pipes on my truck. If I did that I would have to take off the o2 sensor and take the cat off. Would that mess up the preformance and run rich because of the o2 sensor. Is there any way around the computer with out spending alot of money. ohh, and I don't have to take emmisions test.
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smartDakowner
Dodge Dakota
6/02/2001
09:36:34
| RE: cut cat?????
IP: Logged
Message:
CyberWolf Come to my place of bussiness in Cleveland and try to get certed for Ohio tags. Betcha don't get em.
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Ryan Kane
Dodge Dakota
6/03/2001
00:37:32
| RE: cut cat?????
IP: Logged
Message:
I have my vehicle registered in a county that doesnt do emissions testing. So, I went to the big city of Salt Lake and out of curiosity I took it in to an emissions place just for fun to see how it would test out.
There are two parts to the test here in Salt Lake:
1) the visual inspection or "tampering"
2) the actual exhaust pipe testing
Of course, there is no way I could pass the visual inspection since the cat was cut out, but I did pass the exhuast pipe test just fine. It is possible to get your engine running smooth and clean WITHOUT a cat. If I lived in a county that required a cat, of course I would have one. I probably would buy one of those aftermarket freeflowing ones.
1989 4x4 3.9L
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rthomas
Dodge Dakota
7/07/2001
11:11:56
| RE: cut cat?????
IP: Logged
Message:
I will make it simple for you idiots. If you have an o2 sensor behind the cat -DONT cut. If not go ahead. It wont gain much power but it will sound much better. I am sorry you dont live in Georgia because emisions laws are not strictly inforced here.
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smartdakowner
Dodge Dakota
7/08/2001
09:31:42
| RE: cut cat?????
IP: Logged
Message:
in Ohio tampering with emission controls will cost you $500 per day and removing them is $2500 per day even if you are a non resident and the vehicle is not registered here. Hope you are independently wealthy when you visit here.
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rtthomas
Dodge Dakota
7/08/2001
10:13:18
| RE: cut cat?????
IP: Logged
Message:
So mister dumbdakotaowner, you are in Cleveland. Well I'm in Georgia and if I need to go to Michigan, I will go through Indiana to avoid you.
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rthomas
Dodge Dakota
7/08/2001
15:05:16
| RE: cut cat?????
IP: Logged
Message:
Hello, i would like to say that I am rthomas and there is also an rtthomas. apparently we are both from the same state. We also dont like the whiny ignorantdakotaowner who feels that he has the anwser to everyones emissions blues.
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rthomas
Dodge Dakota
7/08/2001
15:06:46
| RE: cut cat?????
IP: Logged
Message:
p.s. Ohio should be kicked out of the union.
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rtthomas
Dodge Dakota
7/11/2001
22:18:57
| RE: cut cat?????
IP: Logged
Message:
"Whiny ingnorantdakotaowner" Hummmm....I like it.
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Me
Dodge Dakota
JOIN HERE
10/22/2002
23:14:25
| RE: cut cat?????
IP: Logged
Message:
To pass visual inspection, why not simply clean out a cat and weld it back on?
And if a car is passing emmisions, why get irritated with the fact people do not have a cat installed? If they installed it, what difference would it make? Pass is pass. Damn left wing democrats want you to do it just because they say so..the hell with the facts.
If you are looking for free HP you are really better off with advancing the timing or a cooler thermostat. Do both and you can expect 12 to 18 HP gain. Removing the cats on a stock engine will probably be somewhere around 4-6 HP..depending on the size of the engine. ( smaller engine may even be less gain..or worse, take away power )
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